Die-reaming machine



Nov. 20 .1923.

- A. NELSQN DIE REAMING MACHINE Original Filed June 5, 1920 2 Sheets-Sheet 1 Nov. 20, 1923. I 4, A. NELSON DIE REAMING MACHINE Original Filed June 5, 3.920 2- Sheets-Sheet 2 Patented Nos. 2Q, 1923.

NET STAT ALBERT NELSON, OF WORCESTER, MASSACHUSETTS; EVELYN J. NELSON ADMINISTRA- TRIX OF SAID ALBERT NELSON, DECEASED, ASSIGNOR TO EVELYN J. NELSON, OF

WORCESTER, MASSACHUSETTS.

DIE-REAIVIING MACHINE.

Application filed June 3, 1920, Serial No. 386,290. Renewed October 12, 1923.

To all whom t may concern:

Be it known that I, ALBERT NELSON, a citizen of the United States, residing at Vxorcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Die-Reaming Machine, of which the following is a specification.

This invention relates to a machine for reaming dies usually made of cast iron which are employed for use in drawing wire. The principle of the machine can be made use of also for smoothing, enlarging, and resizing dies after they have been used.

The principal objects of the invention are to provide a construction suitable for supporting a plurality of spindles and rotating them constantly at the same speedand in such position that they will be located with respect to each other in the same way as the die openings in a die block of stand ard make; to provide a practical feed for presenting the work to the tools which can be adjusted to bring the die openings to the proper diameter for difierent sizes of wire by the use of a set of tapering reamers; to provide for roaming the openings all to the same size; and to provide improved means for operating the adjusting devices and for running the machine.

Reference is to be had to the accompanying drawings, in which- Fig. 1 is a horizontal section on'the line 1-1 of Fig. 2 of a machine constructed in accordance with this invention;

Fig. 2 is a side view of the same;

Fig. 3 is an end view, and

I Fig. 1 is a horizontal sectional view on the line 4:4: of Fig.2.

This invention is designed for supporting and feeding a dieblock 28 to present it to reamers 25'. The die block usually is made of cast iron and cast with a number of conical openings 2? therethrough, ten being frequently the number used. This, as is well understood, is employed for simultaneously drawing a plurality of wires'through these dies or holes. They must be finished out to exactly the right diameter in order to make a good job of drawing. It is for the purpose of reaming out a set of these open ings simultaneously after they are cast that this invention is designed.

The machine is shown in a form in which it involves a frame consisting of uprights 10 supporting the main part of the mechanism. These uprights are provided with a horizontal piece 12 at the top which constitutes the top of the machine proper, and is provided with bearings for a series of spindles 14. These spindles also have ball bearing cages 15 at the top located in an upper plate 16 which is supported from the plate 12 by spacing pieces 17 or the like which may be integral with the plate 16 as shown, and carry an intermediate horizontal plate 13.

I have shown two series of spindles 14, each one being provided with a pinion 18, the pinions of a single series all meshing together and one of them meshing with a pinion 19 on the driving shaft 20. It will be noted that two of these driving shafts, are shown, one for each series of spindles and each having a pulley 21 driven by a belt. These driving shafts are supported in bearings at the bottom on the plate 12 and at the top on a cross bar 22, supported from said plate 12 by uprights 23, or in any other desired manner. This arrangement is provided for the purpose of supporting the spindles 14 near enough together. I have mounted the pinions of one series in a plane above those f the other. This enables me to support the heads 24 below in such close proximity to each other that the reaming tools 25, which are secured to said heads by et screws or the like, will be in proper relation to each other to enter the several holes 27 in a die block 28 when presented to them. Whether there are one or more sets of reamer spindles, and no matter how many in a set, they all operate simultaneously and do their work alike. The machine may be designed for operating on blocks having any desired number of die openings.

On the top plate 12 is mounted a frame which carries a bearing for a vertical shaft 30 which also has a bearing in the plate 12. This shaft is provided with a pulley 31 above the plate 12 for running it. In the form shown, I have illustrated only one of these shafts although two or even four of them can 'be used under some circumstances.

This shaft is provided with a pinion 33 below the table 12 which meshes with a gear 34: on a shaft 82. This shaft as well as the lower end of the shaft 30, is carried by a frame 38sliding in ways 87 on the frame .35 positively.

10. By means of gears 36 and 39 it drives two shafts 35. The gears are located beyond the frame 10 on the end of the machine and can be of any desired construction. The shaft is made telescoping and with a sliding key way so that the gears and pinion can be raised or lowered to drive the two horizontal, but vertically adjustable, shafts from the pulley 31 above. Each of these shafts 35 has bearings in the frame 38 and in an opposite sliding frame 40. In the form shown the frames 38 and 40 each has two bearings one for each of the shafts 35. Each of the frames 38 and 40 slides on the frame 10, being vertically movable in guidewa s 37 and 41 thereon.

ach of the frames 38 and 40 rests on a non-rotating adjusting screw 42 centrally located adjacent to the frame upright 10 and adapted to be adjusted up and down to raise the shafts 35. This is done by a hand wheel 43 on a shaft 44 having two worms 45 operating gears 46 internally screw threaded for receiving the screws 42. it Will be seen, therefore, that by means of the adjustments described, the frames 38 and 4G can be adjusted simultaneously and equally to any convenient height, the shafts 35 mov= ing up and down with them. This is to provide for reaming different sized holes in accordance with. the location of the die plate being operated upon along the tapering reamer 25. On one of the uprights 10 is a scale 46 and connected with the frame 38 is a pointer 47, the former being calibrated so that the operator can determine the diameter of the holes to be reamed in accordance with the height to. which the frames 38 and 40 are adjusted.

It will be seen therefore that the rotation of the pulleys 31 will rotate the two shafts The result of this. no matter what thevert-ical adjustment may be, is to rotate four cams 48 with which these shafts are provided. The idea of the device is to rotate these cams in opposite directions but equally through one complete rotation from a point at which their low surfaces are at the top for receiving a holder 49 for the die block 28. Thus all tendency of the support to move sideways is balanced. This support is. made of definite dimensions and provided with any desired means at the ends to secure the die block in accurate position therein.

The die 28 is inserted between the uprights 10 upon the support or holder 49 carried by the cams 48. Now, the rotation .of the shafts 35 in opposite directions will cause the two pairs of cams 4.8v to swing over toward each other and raise this die bloc-l: accurately and; without tilting it. No action will, take place until the. die block is raised to.v the proper position with respect to. the;- reamers and then they act to. ream out all the holes to the same diameter being originally shaped alike and set accurately.

This is a short operation and the shafts 35 can be rotated continuously while it is taking place. The cams then come around to their low position and this rotation can then be stopped. The operator then removes the die plate and inserts another die plate in the holder in the machine. The action of stopping this machine at this point is not strictly necessary as the operator may have other die plates ready to insert so that he can take them out and put them in while the machine is operating. The speed of'the shafts 35 is comparatively slow and the shape of the cams 48 is such that the die plate holder is at its lowest level throughout a material part of arevolution. The reamers are intended to operate continuously all the time while the dies are being removed and replaced. It'will be seen that the size of the holes-is regulated by the. maximum height to which the die plate is raised by the cams and that is read right on the scale above mentioned and the shafts adjusted properly to get the right size of holes.

In addition to the reaming operation, the holes can be smoothed out on the same machine by the substitution of a smoothing tool for each reamer 25, or a separate machine can be used for that purpose in acco-rdance with the size of the plant and the number of die plates that have to be operated upon. Ordinarily a separate machine is designed for'each type. of die. One machine serving for example for ten hole dies, and another for fourteen hole dies.

Although I have illustrated and described only a single form of my invention, 1- am aware of the fact that changes and modifications can bemade in the same by any person skilled in the art without departing from the scope of the invention as set forth inv the claims.

Therefore I do not wish to be limited to all the details of construction and combinatlons of parts herein shown and described, but what I do claim is:

1. In a machine for simultaneously realning. out the several dies in a wire-drawing die block to the samev size, the combination.

with a frame and a series of identical tools arranged in alignment across said frame all set at the same elevation, and. means for simultaneously rotating said tools, of a work holder located across the frame, the.

the mbination. of a. plurality of tools arranged aretlel with, each. other, means 1 ,474,eee Q for rotating said tools simultaneously, a pair of parallel shafts, cams on each shaft, a work holder supported by said cams, said cams being arranged to project in opposite directions from their respective shafts, and means for rotating the shafts in opposite directions to raise the work holder support equally on both sides and cause it to move toward the tools without change in direction.

3. In a machine for reaming die blocks, the combination of a plurality of reamers of a general conical shape, each having a cutting edge extending therealong and gradually diverging from the axis toward one end, means for rotating said reamers simultaneously, the centers of said reamers being located in position so that they will all enter the perforations in the die block simultaneously, means for adjusting the die block toward the reamers a short predetermined distance, means for limiting the movement of the die block, and means for determining the sizes of all the holes by adjusting the point at which the die block ceases to move toward the reamers.

4. In a machine for reaming die blocks, the combination of a plurality of reamers, means for rotating said reamers simultaneously, the centers of said reamers being located in position so that they will all enter the perforations in a die block simultaneously, a pair of parallel shafts, each having a cam thereon, said shafts, rotating in opposite directions, whereby said cams will raise the die block equally on both sides and cause it to move toward the reamers without change in direction.

5. In a machine for reaming die blocks, the combination of a plurality of reamers, means for rotating said reamers simultaneously, the centers of said reamers being located in position so that they will all enter the respective perforations in a die block simultaneously, a holder for the die block, a pair of horizontal shafts, cams on said shafts on which the holder rests, means for moving the die block holder toward the reamers a short predetermined distance, a driving shaft having a telescoping construction, a frame movable on the machine having bearings thereon for said telescoping shaft, and means on said frame for transmitting rotation of the driving shaft to said horizontal shafts to rotate them in opposite directions.

6. In a machine for the purpose described, the combination of a plurality of tools, the centers of said tools being located in position so that they will all enter respective openings in the work simultaneously, a holder for the work, means for moving the work holder toward the tools a short predetermined distance, a driving shaft having a telescoped construction, means for transmitting the motion of rotation from the driving shaft to the tools, a frame movable on the machine and having bearings thereon for one section of said telescoping shaft, and means on said frame to transmit rotation of the driving shaft to said tool moving means to move the same along the frame toward the tools.

7 In a machine for simultaneously reaming out the several dies in a wire drawing die block to the same size, the combination with a frame and a plurality of identical conical reamers all set on the frame at the same elevation, of a die block holder, means for moving the holder along the frame toward the reamers with a parallel motion so that the reamers will all ream their respective holes to the same size, a pointer movable with the die block holder, and a scale arranged up and down the frame and having divisions indicating by the position of the pointer the smallest diameter of the holes reamed by said reamer.

In testimony whereof I have hereunto affixed my signature.

ALBERT NELSON. 

